Impact of low frequency sounds?

Low frequency sounds have a distinct impact on both physiological and emotional responses. According to Andrew Huberman, low frequency sounds can induce specific facial expressions and emotional states. For instance, hearing spaced-out low frequency tones can evoke facial expressions and emotional reactions tightly linked to the cadence of the sound. This relationship between sound frequency and facial expression is mediated by 'labeled line' circuits in the brain, connecting auditory inputs to facial and emotional responses 1.

Moreover, low frequency sounds can also alter the emotional tone within the listener's brain. Neurons in the brain can entrain to the frequency of these sounds, shifting the brain toward a state of lower frequency oscillation associated with calmness. This effect is involuntary and can significantly influence the listener's emotional state 2.